用CLLocationManager得到当前城市和国家的名称

原问题来自于CSDN问答频道，详细解决方案见： http://ask.csdn.net/questions/1706

问题描述：
通过使用CLLocationManager得到当前城市和国家的名称。

解决方案:

- (void) getReverseGeocode
{
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];

    if(currentLatLong.count > 0)
    {
        CLLocationCoordinate2D myCoOrdinate;

        myCoOrdinate.latitude = LatValue;
        myCoOrdinate.longitude = LangValue;

        CLLocation *location = [[CLLocation alloc] initWithLatitude:myCoOrdinate.latitude longitude:myCoOrdinate.longitude];
        [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error)
         {
             if (error)
             {
                 NSLog(@"failed with error: %@", error);
                 return;
             }
             if(placemarks.count > 0)
             {
                 NSString *MyAddress = @"";
                 NSString *city = @"";

                 if([placemark.addressDictionary objectForKey:@"FormattedAddressLines"] != NULL)
                     MyAddress = [[placemark.addressDictionary objectForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
                 else
                     MyAddress = @"Address Not founded";

                 if([placemark.addressDictionary objectForKey:@"SubAdministrativeArea"] != NULL)
                     city = [placemark.addressDictionary objectForKey:@"SubAdministrativeArea"];
                 else if([placemark.addressDictionary objectForKey:@"City"] != NULL)
                     city = [placemark.addressDictionary objectForKey:@"City"];
                 else if([placemark.addressDictionary objectForKey:@"Country"] != NULL)
                     city = [placemark.addressDictionary objectForKey:@"Country"];
                 else
                     city = @"City Not founded";

               NSLog(@"%@",city);
               NSLog(@"%@", MyAddress);
             }
         }];
    }
}